ch.codeblock.qrinvoice.qrcode.IText4QrCodeWriter Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of qrinvoice-openpdf Show documentation
Provides an OpenPDF specific payment part receipt writer
There is a newer version: 1.20
/*-
 * #%L
 * QR Invoice Solutions
 * %%
 * Copyright (C) 2017 - 2022 Codeblock GmbH
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * -
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * -
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * -
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses are available for this software. These replace the above 
 * AGPLv3 terms and offer support, maintenance and allow the use in commercial /
 * proprietary products.
 * -
 * More information on commercial licenses are available at the following page:
 * https://www.qr-invoice.ch/licenses/
 * #L%
 */
package ch.codeblock.qrinvoice.qrcode;

import ch.codeblock.qrinvoice.OutputFormat;
import ch.codeblock.qrinvoice.TechnicalException;
import ch.codeblock.qrinvoice.layout.DimensionUnitUtils;
import ch.codeblock.qrinvoice.layout.Rect;
import ch.codeblock.qrinvoice.output.QrCode;
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Image;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfWriter;

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import static ch.codeblock.qrinvoice.layout.DimensionUnitUtils.millimetersToPoints;

public class IText4QrCodeWriter implements IQrCodeWriter {
    private static final Rect QR_CODE_RECTANGLE;

    static {
        QR_CODE_RECTANGLE = Rect.create(0F, 0F, millimetersToPoints(SwissQrCode.QR_CODE_SIZE.getWidth()), millimetersToPoints(SwissQrCode.QR_CODE_SIZE.getHeight()));
    }

    private final QrCodeWriterOptions options;

    public IText4QrCodeWriter(final QrCodeWriterOptions options) {
        this.options = options;
    }

    @Override
    public int getQrCodeImageSize() {
        final int dpi = options.getOutputResolution().getDpi();
        final float qrCodeMillimeters = SwissQrCode.QR_CODE_SIZE.getWidth();
        // millimeters to pixels
        return DimensionUnitUtils.millimetersToPointsRounded(qrCodeMillimeters, dpi);
    }

    @Override
    public QrCode write(final String qrCodeString) {
        final QrCodeWriterOptions qrCodeWriterOptions = new QrCodeWriterOptions(options.getOutputFormat(), getQrCodeImageSize());
        final BufferedImage qrCodeImage = JavaGraphicsQrCodeWriter.create(qrCodeWriterOptions).writeBufferedImage(qrCodeString);

        try {
            final ByteArrayOutputStream baos = new ByteArrayOutputStream(25 * 1024);
            final Rectangle pageCanvas = new Rectangle(QR_CODE_RECTANGLE.getWidth(), QR_CODE_RECTANGLE.getHeight());
            final Document document = new Document(pageCanvas, 0, 0, 0, 0);
            final PdfWriter writer = PdfWriter.getInstance(document, baos);
            document.open();

            addQrCodeImage(writer, qrCodeImage);

            document.close();
            return new QrCode(OutputFormat.PDF, baos.toByteArray(), null, null);
        } catch (DocumentException | IOException e) {
            throw new TechnicalException("Unexpected exception occurred during the creation of the qr code", e);
        }
    }


    private void addQrCodeImage(final PdfWriter writer, final BufferedImage qrCodeImage) throws IOException, DocumentException {
        final Image image = Image.getInstance(qrCodeImage, null);
        image.setAbsolutePosition(QR_CODE_RECTANGLE.getLowerLeftX(), QR_CODE_RECTANGLE.getLowerLeftY());
        final float size = QR_CODE_RECTANGLE.getWidth();
        image.scaleToFit(size, size);
        final PdfContentByte canvas = writer.getDirectContent();
        canvas.addImage(image);
    }
}